|
Axis
|
Three axis
|
|---|---|
| Geophones | One per axis |
| Geophone frequency | 10 Hz |
| Sampling rate | 1, 2, or 4 ms (selectable) |
| Low-cut frequency | 0.2 Hz |
| Low-cut slope | 18 dB/octave |
| High-cut frequency | 250 Hz for 1-ms sampling |
|
|
125 Hz for 2- and 4-ms sampling |
| High-cut slope | 36 dB/octave |
| Digitalization | Downhole |
| ADC resolution | 11 bit + sign |
| Autoranger steps | Five 6-dB steps |
| Preamplifier gain | 40 to 106 dB by 6-dB steps for each axis |
| Dynamic range per waveform | 90 dB |
| Total dynamic range | 156 dB |
Note: ADC = analog to digital converter.